It would be best if you bring your current contact lenses or glasses with you. This way, the doctor can make sure your prescription is the best one for you. You can also appraise your doctor of any changes you might have noted since your last test. Be sure to disclose the names of any medications you are currently taking, including homeopathic medications. Don't hesitate to bring up any questions or concerns that you might have. Carry a pair of sunglasses since you may experience blurry vision or discomfort after the test. Finally, make arrangements for someone else to drive you home.